Exchanging money for BTC (the buying company) and BTC back to money (so the worker can pay rent and buy food) isn't fast nor free, and is likely to cost more than the 1-3% once all those expenses are factored in.

BTC is a possibility for settling particular purchases, but it's not the best way to receive your main income, it's like getting paid in an obscure foreign currency.

More places are starting to take it. It might end up being a grassroots thing.

Last month I was at a sheep and wool festival (yeah just what it sounds like) in central MD, visiting a merchant in a straw floor awning tent at the county fairgrounds. He had a sign up saying he preferred BTC because card fees kill him. My wife whipped out her Mycelium app and the transaction went through in seconds.